Sectional core for making concrete piles.



PATENTED APE. 1.9., 1904. G. H. POOR. SEGTIONAL vooEE EOE MAKING CONCRETE PILES.

APPLICATION PILEVFEB. 23, 1904.

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PATENTBD APR. 19, 1904.

N0. 757,767. vG'l Hl SEGTINAL GORE FR MAKING GONCRETE PILES.

APPLICATION FILED PEB. 23, 1904.

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UNITED STATES Patented April 19, 1904;

PATENT I OFFICE.

GEORGE H. IJOOR, OF CHICAGO, ILLINOIS, ASSIGNORTO SAMUEL WORTHINGTON MGMUNN, OF CHICAGO, ILLINOIS.

SECTIONAL-CORE FOR MAKING CONCRETE PILES.

SPECIFICATION ibrmingpart of Letters Patent No. 757,767, dated April 19, 1904.

Application tiled February 23, 1904. Serial No. 194,928. (No model.)

10 tu whom, it nfl/ay concern.-

-Be it known that I, GEORGE H. POOR, a citil have invented certain new and useful Improvements in Sectional Cores for Making Concrete Piles; and I do hereby declare that the following is afull, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of reference marked thereon, whichform a part of this specification. s Y

This invention relates to a novel construction in sectionallexpansible cores adapted for use in driving hollow shells of paper or other material in that process of making 4concretepile foundations in which a core with a surrounding shell is driven into the ground. The core is then withdrawn from the shell, which hardening forms a concrete pile.

The invention consists in the matters hereinafter described, and pointed out in the ap- Y B3, whicht'ogether form they rounded lower Vend or point of the core;

pended claims.

In the'accompanying drawings, illustrating my invention, Figure l is a view in side Velevation of a sectional core embodying my invention. Fig. 2 is a longitudinal axial sec- Fig. 3l is'an enlarged detion of the saine. tailv longitudinal section of the larger or upper end of the core, showing the same in its contracted condition. Fig. 4 is a cross-section .taken on line I AI-of Fig. 3. Eig. 5 is a detail plan view of the collar on the operating-rod' shown in Fig. 3. Fig. 6 is a vcross-section Ytaken on line 6 6 of Fig. 3.

A core embodying my invention is hollow or tubular and is divided longitudinally into a .plurality of separate'sections which are mov-y being larger at its upper than at its lower endand closed at its lower end or point. As illustrated in the accompanying drawings, the core consists of three sections A A A, which meet edge to edge to form the complete core.

First referring to certain details of construction in the hollow core itself, each section A is shown as consisting of a plurality of curved exterior 'sheet-metal plates a a c, the

` end margins of which meet each other edge to edge Vor in abutting relation, so as to form a smooth exterior surface on the core. The said plates a a a are joined by means of interior segmental plates B B B B', to the outer surface of which the ends of the plates a a a are secured by holt-s or rivets. Other similar segmental plates B B are secured by rivets to the inner surfaces of the Vplantes ci, a o. Said plates B B' serve to stiifen transversely or to may serve as joint-plates. A At the top or larger end of the core theplates c ac are reinforced Vby interior cast-metal segments B2 B2, which are riveted to the plates and extend to the upper edges-thereof. At the lower ends of the sectionsrth'e latter are provided with exteriorly rod-fid'ed or convex segmental heads B3 Now referring to the means shown for spreading apart or expanding'the sections of' the core and holding them inv their expanded position While the-core vis within the paper shell and is being driven into the grund devices are provided as follows:

C indicates a centrally-arran ged longitudinal actuating-rod which extends through the hollow core from end to end thereof and has a limited lendwise movement therein. Said rod .C is provided with a plurality of enlargements or collars c c c' c. In connection with two or more of the collars o c on the rod C are plates. On the several sectionsA A A are also located inwardly-projecting arms D D',

provided with inwardly-facing bearing-surfaces adapted for engagement with the collars c c. Said arms D D are preferably attached to the interior segmental plates B B, which are secured to the inner faces of the'plates a a CZ. Said arms are conveniently formed with said plates each by an integral casting.

The inner ends of the ring-segmentsD D and arms Dl D are provided withshoulders Z 0Z2 and below said shoulders with bearingfaces Z3 di, parallel with the centralV axis of the core, said shoulders and bearing-faces being adapted for-contact with the enlargements or collars c c on the rod C, and the parts being so arranged that when the said rod is moved downward within the shell the collars c c. will by acting upon the said shoulders force the sections A A A outwardly, and said collars will then engage the bearing-faces Z3 OZL, so as to positively hold the sections in their expanded positions. Said bearing-surfaces Z3 cZ4 being approximately parallel with said rod, it follows .that after said rod isV moved downwardly to bring the collars c c into engagement with said surfaces the sections cannot be forced inwardly or collapsed without first lifting the rod to bring the collars c c above the said shoulders d d2.

The meeting or contacting edges of the collars c c' and the arms D and ring-segments D are beveled or rounded in such manner that when the several collars are together shifted or moved downwardly through the endwise downward movement of the rod C the collars will not catch on the shoulders, but will pass over the same to effect the expansion of the sections.

At the lower end of the shell or core the segmental heads B3 B,5 are provided with interior shoulders CZ5 and longitudinal bearingsurfaces ZZ, said shoulders and surfaces being adapted for engagement with the lower end of the rod C, so that in the downward movement of said rod the said segmentalheads will be forced outwardly in the same manner as are the ring-segments D and arms D.

The actuating-rod C is attached at its upper end to a metal head or disk E, which is located at the top of the-core and which is vertically movable relatively to the core and which when the actuating-rod C is depressed and is in its: lowermost position rests upon the top edge of y the several core-sections A A A. The rod C is shown as consisting of a tube which is secured to the head E by having its upper end screw-threaded and inserted in a screw-threaded socket'in the said head. Atransverse pin e, inserted through the head and rod, serves to hold the rod securely in the head. Said head E is designed for contact therewith of the driving head or hammer by which the core and its surrounding shell are driven into the ground. Said head is, moreover, provided with attaching means, such as the perforated lugs c e', by which hoisting-chains connected with the driving. apparatus may be connected therewith when hoisting the core to bring it into position over the place where it is to be driven and when Ylifting the core from the shell after the same has been driven into the ground. In a construction in which the said actuating-rod is attached to the head E, therefore, the rod is moved upwardly to lift the several collars c c and permit the collapse of the sections of the core through the power applied to the head E for lifting the core. In other words, when the core is bodily lifted through hoisting means ,connected with the head E a preliminary upward movement of the head relatively to thecore has the effect of shifting the actuating-rod Cupwardly in the core, and thereby bringing the collars c c above the the shoulders uZ/ Z2 and permitting the collapse of the core-sections and consequent decrease in the exterior size of the core in readiness for the placing of, the exterior paper shell thereon. When the shell has been placed on the core and the core and shell lowered for driving, as soon as the lower end of the shell and core rest upon the ground and suitable resistance is thereby afforded to the downward movement of the core and shell the head and attached actuating-.rod move downwardly within the core, so that the collars c c', acting on the shoulders cZ d2, forcethe seetions of the coreoutward into close contact with the interior of the shell, and the parts will then be in condition for the driving, of the core and shell into the ground. Such downward movement of the actuating-rod C may be effected by'theweight of the parts themselves or by applying downward pressure on the head through the action of the drivinghammer used to force the shell and core into the ground. i

1t follows from the above that when the parts are constructed as herein describedthat is to say, when the actuating-rod C is connected with a headV E, upon which the driving-hammer acts and which has vertical Ymovement with respect to the core-the operation of the device in the contraction and expansion of the core is practically automatic, requiring no specialmanipulation of the parts to effect such expansion and contraction. far as the operation of the said actuating-rod in connection with the expansible and contractible sections is concerned, however, said rod may be given endwise movement otherwise than through its connection with a head which is acted upon by the driving-hammer, and some of the principal features of the invention may, therefore, be carried into practice without the employment of the drivinghead E, connected with the rod C, in the particular manner herein shown and above described.

In addition to the vfeatures of construction IOO IIO

Sol

hereinbefore set forth the devices herein illustrated include means for` limiting the outward movement or spread of the core-sections A A A when the same are expanded, said means being constructed as follows:y Onthe said actuating-rod G below the ring-segments D D are arranged rigidly-affixed collars F F, provided with upwardly-extending arms j', arranged generally parallel with the said rod C and adapted to engage the outwardly-facing bearing-surfaces on the core-sections in such manner as to limit the outward movement of said sections. Said outwardly-facing surfaces are shown as formed on the outer surfaces of the ring-segments D. The collars F F are movable with the actuating-rod C; but the arms f thereon are made of such length that they will be inV position to engage the said ring-segments D D when the said rod is moved downwardly, so as to bring the collars 0c into engagement with the lower bearingsurfaces d* of said ring-segments. The arms f are shown as engaging `guide grooves or notches c?, formed in the' ring-segments D between the arms d, the sides of the notches forming guide-surfaces, which by their engagement with the sides of the arms j serve to hold the core-segments A A A accurately inV position with respect to each other and the rod C.

The core illustrated'is provided with two sets of ring-segments D and two collars F, provided with holding-arms ff; but the core may be provided with a greater number of these parts if found necessary or desirable in any particular instance.

The sets of arms D D'and coacting collars c c will preferably be arranged intermediate' to the'ring-segments D D and at such distances apart along the length of the core-segments as to'prevent any inward bending or deflection of the same under pressure coming upon the exterior of the core in driving the core and shell into the ground.

In order to hold the core-segments A A A from relative endwise movement both in the handling of the core andfin the driving opera-A tion, I provide a constructipn as follows: G is a ring which surrounds the upper end of the core above the part thereof which is covered byV the shell when the'shell is on the core and below its upper margin. Attached to each coresection A above and below the ring G are outwardly-extending anges g g, preferablyT having the form of angle-irons, riveted to the core-sections. Said anges g g bear upon the opposite or upper and lower edges of the ring G and form guide or bearing surfaces adapted to prevent endwise movement of either of the sections with respect to the others. The inneror adjacent faces of said iianges g g, constituting the guide-surfaces referred to, are

parallel with each other, so as to permit free inward and outward movement of the coresections in the expansion and contraction thereof. I

I-I in the drawings indicates the paper 'shell' which is applied to the exterior surface of or surrounds the core and Vwhich is placedover or upon the core preparatory to the driving operation. Said shell will usually be made open at both ends, as heretofore, and in connection therewith will be used a cap 71 which covers the roundedv lower end of the c ore and overlaps the lower edge of the shell.

To enable the shell to be accurately located on the core previous to the expansion of the latter, so as to prevent the shell from being forced too far upon the core and consequent liability of bursting the shell during the expansion of the core, one or morestops or lugs -I are secured to the core-sections A A A in fore been employed-that is to say, the shell is placed over the core when the same is contracted, and the sections are then expanded to bring the core into close contact with the surrounding shell, the shell and core are then driven into the ground by a pile-driver or like device acting upon the upperend of the core, and after thecore has been driven a sufv`vficient depth into the ground the core is contracted and withdrawn from the shell, the latter remaining in the ground and being filled with cement or like material.

Expansible cores adapted for use in connection with shells have heretofore been provided wit-h endwise-movable rods, and the rods and core-sections have been provided with inclined or wedge-likecontacting surfaces by which the core-sections are forcedoutwardly through endwise movement of the said rod.

AThe

. 9o The sectional and collapsible core described is used in connection with the paper shell in Vthe same manner as such cores have hereto- IOO IIO

In devices of this kind, however, the contacting wedgesurfaces on the core-sectionsA and actuating-rod'have beenl uniformly inclined, so that lnward pressure on the core-sections tends to move the said rod endwise, and there ing-rod Yand consequent shifting of the rod in a direction to permit inward movement of the sectlons. In the construction herein described the lnwardly-facing bearing-surfaces on4 the sections being parallel with thef'central axis of the core have positive locking engagement with the collars on the rod, so

that there can be no inwardv movement of the" lsections unless the-rod be first moved endwise! far enough to release said collars from said' bearing-surfaces.

I claim as my inventionl. A core for the purpose. set forth comprisprovided each with a plurality of inwardlyfacing bearing-surfaces, and an endwise-movable actuating-rod extending lengthwise of the core and provided With a plurality of enlarge-A ments or collars adapted for engagement with said bearing-surfaces on the sections, said bearing-surfaces being provided with shoulders and adjacent to said shoulders with parts parallel with the longitudinal axis of the core,

for engagement with said collars or enlarge-y ments, when the sections are expanded.

3. A core for the purpose set forth comprising a plurality of radially-movable sections,v

each provided with a plurality of inwardlyfacing bearing-surfaces and an endwise-movable actuating-rod extending endwise of the core and provided with enlargements or col-Z lars adapted to engage said inwardly-facing bearing-surfaces, said bearing-su rfaces having' shoulders and adjacent to said shoulders parts parallel with the central axis of the core adapt-I ed for engagement with the said collars when' the actuating-rod is moved endwise in the core,

and a head to which said rod is attached, which 1 is movable endwise of the core and adapted to bear upon the upper end of the same."

4. A core for the purpose set forth comprising a plurality of radially-movable sections,

and a central actuating-rod provided with' enlargements or collars adapted to engage inwardly-facmg slurfaces on the sectlons to hold the latter expanded, said rod being also-1pro vided with arms which extend longitudinally of the rod and are adapted to engage 'outwardly-facing surfaces formed on said sections to limit the outward movement ofthe same. 5; A core for the purpose set forth com-prising a plurality of radially-movable sections,

each section consisting of a pluralityof curved f sheet-metal plates joined end to end and segmental joint-plates to which the adjacent ends of the plates are riveted, and an endwise-movable actuating-rod extending lengthwise of the core and provided with a plurality of enlargements or collars, said joint-plates being provided with inwardly-facing bearing-surfaces adapted for engagement with the said enlargements or collars on the actuating-rod.

6. A core for the purpose set forth, comprising a plurality of radially-movable sections,

each'section consisting of a plurality of curved sheet-metal plates joined end to endf and seg- Amental joint-plates to which the adjacent ends of the plates are riveted, and an endwise-movable lactuating-rod extending lengthwise of the core and provided with a plurality of enlargements or collars, said bearing-'plates being provided With rigidly-attached ring-segments having inwardly-facing bearing-surfaces adapted for engagement with the said collars and also with outwardly-facing bearing-surfaces, andthe said'rod 'being provided with arms extending parallel therewith and adapted to engage the said outwardly-facing bearing-surfaces on said ring-segments.

7. A core for the purpose setforth comprising a plurality of radially-movable sections,

each provided with a plurality of ring-segments having inwardly-facmg bearing-surfaces, and an endwise-movable actuating-rod extending endwise of, the core and provided with enlargements or collars adapted to engage the said inwardly-facing bearing-surfaces, said ring-segments being also provided with outwardly-facing bearing-surfaces, and the rod having arms arranged parallel with the rod and adapted to engage said outwardlyfacing bearing-surfaces on said ring-segments.

8; A core for the'purpose set forth, comprising a plurality of radially-movable sections, eachprovided with a plurality of ring-segments yand also with a plurality of inwardly extending arms, and an actuating-rod providedwith a plurality of enlargements or collars adapted to engage collars, said ring-segments and arms being provided with' inwardlyfacing bearing-surfaces adapted for engagement with said enlargements or collars on the rod, the ring-segments being also provided witlroutwardly-facing bearing-surfaces, and the actuating-rod beingprovided with a plurality'of arms arranged parallel therewith and adapted to engage said outwardly-facing bearing-surfaces ofthe ring-segments.

9. A core f'or'the'purpose set forth, comprising a plurality of radially-movable sections, each V'provided with a plurality of rigidly-attached ring-segments, an endwise-movable actuating-rod extending lengthwise of the core and provided with enlargements or collars, said ring-segments being provided with inwardly-facing bearingsurfaces 'adapted for engagement with said ring-segments, and havlng in their outer faces guide grooves or notches, and the said actuating -rod having 'arms extending parallel thereof and adapted to engage said guide grooves or notches 1n said ring-segments.

10. A core forthe purpose set forth, comprising a plurality of radially -movable sections, each provided with a plurality of inwardly-facing bearing-surfaces, an endwisemovable actuating-rod extending lengthwise of the core and provided with a plurality of enlargements or collars adapted for engageinent with the bearing-surfaces on the sections,

ferentially-extending flanges which engage opposite edges of said ring. Y

12. A core for the purpose set forth comprising a plurality of radially-movable seetions, provided each With a plurality of in- Vvvardly-faQing bearing-surfaces, an endwise;

movable actuating-rod provided With enlargements or coilars adapted for engagement with the bearing-surfaces on the sections; and an adjustable stop on the exterior surface of the'A core adapted for Contact with the edge of a shell placed thereupon.

In testimony that I claim the foregoing as my invention I aflix my signature, in presence of two Witnesses, this 19th day of February,

GEORGE H. POOR.

W'itnesses:

C. CLARENCE POOLE, GERTRUDE BRYGE. 

